I made this one as a decoration object for parties.
Sadly my camera is not exactly in love with UV-light, so I don't have any good action shots.
The whole thing is almost 2m in diameter and took me ages to crochet (I have no idea how long exactly, though). It is made of some pretty cheap acrylic yarn that glows under UV-light and has Metal rings in the back so it can be hung up easily.
There are still some changes to be made, but for now I'm pretty hapy with it :)